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Exhaled breath gas sensing using pristine and functionalized WO3 nanowire sensors enhanced by UV-light irradiation
Moulay Ismail Univ, Dept Phys, Fac Sci, Sensor Elect & Instrumentat Grp, BP 11201, Zitoune, Meknes, Morocco;Moulay Ismail Univ, Fac Sci, Dept Biol, Biotechnol Agroalimentary & Biomed Anal Grp, BP 11201, Zitoune, Meknes, Morocco.
Gdansk Univ Technol, Dept Metrol & Optoelect, Gdansk, Poland.
Gdansk Univ Technol, Dept Metrol & Optoelect, Gdansk, Poland.
Rovira & Virgili Univ, Dept Elect Elect & Automat Engn, E-43007 Tarragona, Spain.
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2018 (English)In: Sensors and actuators. B, Chemical, ISSN 0925-4005, E-ISSN 1873-3077, Vol. 273, p. 1719-1729Article in journal (Refereed) Published
Abstract [en]

The development of advanced metal-oxide-semiconductor sensing technologies for the detection of Volatile Organic Compounds (VOCs) present in exhaled breath is of great importance for non-invasive, cheap and fast medical diagnostics. Our experimental studies investigate the effects of operating temperature selection and UV-light irradiation on improving the response of WO3 nanowire sensors towards exhaled breath exposure. Herein, six WO3 nanowire sensors (both pristine and doped with a range of metal nanoparticles such as Pt, Au, Au/Pt, Ni and Fe) were synthesised via Aerosol-Assisted Chemical Vapour Deposition (AACVD) and characterized by means of Atomic Force Microscopy (AFM), Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM) and Energy Dispersive X-ray (EDX-ray). Breath measurements were performed in the dark and under UV-light irradiation at various sensor operating temperatures. The results demonstrate that UV-light irradiation combined with the optimisation of the sensors' operating temperature can greatly enhance the sensors' responses towards breath exposure.

Place, publisher, year, edition, pages
2018. Vol. 273, p. 1719-1729
Keywords [en]
WO(3)nanowire sensors, Metal nanoparticles, Sensor response enhancement, UV-light irradiation, Operating temperatures, Exhaled breath analysis
National Category
Condensed Matter Physics Engineering and Technology
Identifiers
URN: urn:nbn:se:uu:diva-362623DOI: 10.1016/j.snb.2018.07.098ISI: 000441519000210OAI: oai:DiVA.org:uu-362623DiVA, id: diva2:1254143
Funder
EU, Horizon 2020, 645758Available from: 2018-10-08 Created: 2018-10-08 Last updated: 2018-10-09Bibliographically approved

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Ionescu, Radu

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